Door locking device



July 16,v 1946; H

T. J. NYHU$ DOOR LOCKING DEVICE 2 Sheets-Sheet 1 Filed March 19, 1945 VInventor Theodore Jbbn .ZQaa

July 16, 1946. T. J. NYHUS DOOR LOCK ING DEVICE F iled March 19, 1945 2Sheets-Sheet 2 Inventor Tizeadww Jim @hzw Patented July 16, 1946 noonLOCKING DEVICE Theodore J ohnNyhus, Crane Valley, Saskatchewan, CanadaApplication March 19, 1945, Serial No. 583,613

This invention relates to an improved door locking device and one of itsobjects is to provide a device which will positively lock both sides ofa swinging door, such as is used on trucks and cars, by a. singleturning movement.

Another object of the invention is the provision of a door lockingdevice with a main bolt having on each end a centering head and alooking element, a strap bearing in which the bolt may be turned, and acooperating keeper for each centering head and locking element securedto the sides of the door frame, whereby both ends of the locking boltmay be locked in the end keepers by a simple turning movement of thebolt in its bearing.

Another object of the invention is to provide simple means for lockingthe bolt against turning.

With the above and other objects in view the invention consists incertain new and useful combinations, constructions and arrangements ofparts, clearly described in the following specification, and fullyillustrated in the accompanying drawings, in which- Fig. 1 is a view inelevation showing the improved door locking device applied in workingrelation to a vertically swinging door of a tail end door.

Fig. 2 is a detail view in elevation, showing one end of the bolt andits cooperating keeper, the locking element of the bolt being shown ininsertion position.

Fig. 3 is a detail side elevation showing the bolt handle.

Fig. 4 is a side elevation of one end of the bolt, showing it locked inits keeper.

Fig. 5 is a detail plan view of the handle.

Fig. 6 is a detail sectional view, taken on line 6-6 of Fig. 5, lookingin the direction of the arrows.

Fig. 7 is a detail view in elevation of one of the bolt keepers.

Fig. 8 is a View thereof, partly in section, and partly in elevation.

Fig. 9 is a detail transverse sectional view through the bolt, showingits bearing.

Fig. 10 is a fragmentary view thereof in elevation.

Referring to the accompanying drawings, which illustrate the practicalconstruction of my invention, 5 designates a vertically swinging door,which provides a controlled outlet or valve for the main end door 6. Thedoor 5 is hinged along its upper horizontal edge by the usual hinges 1,

2' Claims. (Cl. 292-218) so as to swing upwardly, and this door 5 isconsiderably smaller than the end door or gate 6.

On the door 5 the cylindrical bearing a is secured by the screws 9,which extend through the integral wing flanges l9 and H thereof. Asimilar bearing 12 is also secured on the door in axial alignmentwiththe bearing 8, but spaced endwise from each other so as to provid anormally open clearance between the adjacent ends of the two bearings.

In the two bearings 8 and 12 a single cylindrical bolt I4 is arranged toturn. On this bolt a sleeve i5 is mounted, so as to engage theconfronting inner ends of the two bearings and thereby limit the end plaof the bolt in these bearings.

The left end of the bolt is formed with a flattened locking element l6,and a terminal centering head [1, at the outer end of said lockingelement. The right end of the bolt is formed with another and similarflattened locking element I8 and provided with a centering head 19 atthe outer end of said locking element.

The centering head I! and the adjacent looking element 16 are receivedby the rigid metal keeper '29, which i formed with an opening 2| largerthan that of the centering head and having a corresponding form orshape, and with a longitudinal slot 22 which communicates with theopening. The centering head i conical in form, and the flattened lockingelement is rectangular in cross section, thus providing a bar sectionwhich has one narrow side and one wide side. The narrow side l6a isadapted to easily enter the slot 22, but the wide side lfib will notenter this slot, being considerably wider than the slot. The keeper isformed with a circular recess 23, the wall of which is formed with anintegral shoulder or stop 24, located on one side of the receiving slot22.

The locking element l6 of the bolt is adapted to enter the slot 22 ofthe keeper 20 and to engage the concave face of the recess 23, when thebolt may be turned so that the rectangular looking element will bedisposed at right angles to the slot, as indicated in dotted lines inFig. 8, when one corner portion of the fiat locking elementwill strikeagainst the shoulder or stop 24 and further turning of the bolt will beprevented.

The right end of the boltis provided with another centering head [9 andwith a rectangular locking element 18, which joins this head to theshank of the bolt. The centering head [9 and the locking element I8 areadapted to engage the keeper 21, which is secured to the door frame onthe side of the sWinging door. This keeper is constructed like thekeeper 2D, and need not be described in detail.

When both bolt ends are in locked relation to the end keepers 20 and 21,the door 5 cannot be forced 0r swung, and if great pressure is appliedon the door, such as develops from the swelling of grain or saw dust,the centering heads of the bolt, which are formed with right angularinner shoulders 20a and 27a, will be forced against the keepers and thuslock the bolt against endwise displacement from the two keepers. Thiswill subject the bolt to tensional resistance, which will be taken up bythe two keepers, which. are attached to the main door or the frameinwhich the small door swings.

By a single turning movement the bolt is thus locked to both keepersagainst swinging motion,

and to both keepers against load pressure or force due to an unlawfulentry effort.

In orderto lock the bolt I provide a handle 28, which has a limitedlateral sliding movement on the sleeve I5. Thi handle is arranged tooperate the locking pin 29, slidable in the bolt, and adapted to engagethe keeper socket 351 formed in the door 5. When the pin 29 is engagedWith the socket 30 the bolt cannot be turned.

It is understood that I may apply my improved locking device to alltypes of swinging doors and movable opening and closing members, and tohouse and building doors supported on vertical hinges fOr horizontalswinging.

It is also understood that I may make various detail constructionalchanges, and vary the arrangement and combination of the parts, asshown, within the scope of the claims of this application.

Having described my invention I claim as new:

1. A door locking device consisting of a bolt having a locking elementon one end thereof, said locking element being rectangular in crosssection and provided With a conical centering head located outwardly ofsaid locking element, and a keeper attachable to the frame of the doorand provided with an opening to receive the centering head and a slot toreceive the locking element, the keeper having a recess communicatingwith the slot in which the locking element may be turned at right anglesto the slot to lock the bolt in the keeper against endwise displacementand lateral displacement.

2. A door locking device, consisting of a bearing, a. bolt arranged toturn in the bearing and provided with a conical head on each end thereofand a rectangular locking element adjacent. the conical head, and akeeper for each end. of the bolt having an opening to receive theconical head and a slot to receive the locking element, the keeperhaving a recess in which locking element engaging the same can lock andhaving a shoulder against which the conical head will bear to restrainthe bolt from endwise displacement from the keeper and to lock the boltagainst lateral unlocking movement from the keeper.

THEODORE JOHN NYHUS.

